Appeal No. 2005-1173 Page 7
Application No. 10/134,793
extension of the plug by the magnet. This scraping may lead to damage of the ceramic
part which, even if only slight, causes the plug not to function.
The aim of the Bogni's invention was to overcome that disadvantages of the prior
art, and to reduce the likelihood of the ceramic part of the plug scraping against the box
spanner and therefore to reduce the likelihood of damage to the plug. This aim was
achieved by means of a box spanner with a device for retaining the object to be turned
with an end which can be connected to auxiliary turning tools and at the open end an
internal polygonal seat which can mate with the polygonal body of the object to be
turned, characterized in that the polygonal seat of given spanner opening is followed by
a hollow space which is delimited by the body of the box and has a transverse width
essentially comparable with the spanner opening of the polygonal seat, and in that, in
the sides of the polygonal seat, the body of the box has housings which accommodate
permanent magnets. Advantageously, the permanent magnets are located in the
adjacent sides of the polygonal seat and extend around half the perimeter of the
polygon.
Morrissey's invention relates to an open, box end, or combination wrench which
incorporates the use of spring loaded plungers to retain a nut in the wrench. The design
facilitates adjustable pressure by which the user can adjust the amount of spring tension
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